Package org.apache.commons.rng

Interface LongJumpableUniformRandomProvider

All Superinterfaces:

JumpableUniformRandomProvider, UniformRandomProvider

public interface LongJumpableUniformRandomProvider
extends JumpableUniformRandomProvider

Applies to generators that can be advanced a very large number of steps of the output sequence in a single operation.

Since:

1.3

Method Summary

Modifier and Type	Method	Description
JumpableUniformRandomProvider	longJump()	Creates a copy of the JumpableUniformRandomProvider and then advances the state of the current instance.
default Stream<JumpableUniformRandomProvider>	longJumps()	Returns an effectively unlimited stream of new random generators, each of which implements the JumpableUniformRandomProvider interface.
default Stream<JumpableUniformRandomProvider>	longJumps(long streamSize)	Returns a stream producing the given streamSize number of new random generators, each of which implements the JumpableUniformRandomProvider interface.

Methods inherited from interface org.apache.commons.rng.JumpableUniformRandomProvider

jump, jumps, jumps

Methods inherited from interface org.apache.commons.rng.UniformRandomProvider

doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, nextBoolean, nextBytes, nextBytes, nextDouble, nextDouble, nextDouble, nextFloat, nextFloat, nextFloat, nextInt, nextInt, nextInt, nextLong, nextLong, nextLong

Method Detail

longJump

JumpableUniformRandomProvider longJump()

Creates a copy of the JumpableUniformRandomProvider and then advances the state of the current instance. The copy is returned.

The current state will be advanced in a single operation by the equivalent of a number of sequential calls to a method that updates the state of the provider. The size of the long jump is implementation dependent.

Repeat invocations of this method will create a series of generators that are uniformly spaced at intervals of the output sequence. Each generator provides non-overlapping output for the length of the long jump for use in parallel computations.

The returned copy may be jumped m / n times before overlap with the current instance where m is the long jump length and n is the jump length of the JumpableUniformRandomProvider.jump() method.

Returns:

A copy of the current state.

longJumps

default Stream<JumpableUniformRandomProvider> longJumps()

Returns an effectively unlimited stream of new random generators, each of which implements the JumpableUniformRandomProvider interface.

Returns:

a stream of random generators.

Since:

1.5

longJumps

default Stream<JumpableUniformRandomProvider> longJumps(long streamSize)

Returns a stream producing the given streamSize number of new random generators, each of which implements the JumpableUniformRandomProvider interface.

Parameters:

streamSize - Number of objects to generate.

Returns:

a stream of random generators; the stream is limited to the given streamSize.

Throws:

IllegalArgumentException - if streamSize is negative.

Since:

1.5